Preservation of cultural heritage is one of the efforts that can be made to maintain and pass it on to the next generation, one of which is Lontar Prasi Bali. Thousands of prasi lontars are recorded in poorly maintained and damaged conditions in terms of form and physical appearance. This article aims to implement Augmented Reality in digitizing the Balinese lontar prasi so that it can preserve, promote, and develop the arts and ancestral heritage so that they have appeal and understanding in the present and even into the future. The application development method uses research and development with the stages of making 3D objects and the process of character animation with Blender, building applications with Unity software and making markers consisting of 3D objects and marker configurations on the Prasi Lontar Sheet. Application testing using a loading response time technique with higher smartphone specification results can provide a faster response time needed to run the application, as well as a User Experience Questionnaire (UEQ) test with 86 respondents who showed pragmatic quality, herdonic quality, and overall results above the average (Excellent), so that it shows that this AR application is good and as expected.